Question

find the HCF of the following by prime factorisation method question 775 and 1800

Answer 1

Step-by-step explanation:

prime factors of 775 =5×5×5×7

prime factors of 1800= 2×2×2×3×3×5×5

now HCF is highest common factor of two numbers.

so here the HCF of 775 and 1800 =5×5 =25 ans.

Answer 2

Factors of 775 are = 5×5×31

Factors of 1800 are = 5×5×2×2×2×3×3

HCF = 5×5

= 25